11 results
The Diagnostic Approach to Hyperkalemia
Drugs
 - Amiloride
 - Spironolactone
 - Triamterene
 - Trimethoprim
 - Pentamidine
 -
I, type II - ... transplant - SLE High ... Renin - Primary ... Ketoconazole Low ... #Hyperkalemia #Algorithm
Workup for Hypophosphatemia - Differential Diagnosis Framework
Rule out spurious hypophosphatemia: paraproteinemia, acute leukemia
Measure Urine Fractional Excretion
Workup for Hypophosphatemia ... • Normal or High ... PTH: Primary or ... • Normal or Low ... Fanconi syndrome, CA
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
Ureterosigmoidostomy Urinary ... and 2, but not type ... Differential #Diagnosis #Low ... #Potassium #Table ... #Classification
Normal Anion-Gap Acidosis (NAGMA) - Differential Diagnosis Framework and Workup

NAGMA
- Chem, ABG or VBG
- Calculate Anion
Framework and Workup ... pH Calculate Urinary ... • Serum K high ... - Diarrhea - High ... Villous adenoma - Losses
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
inhibitors - Primary ... Differential #Diagnosis #Low ... #Magnesium #Table ... #Classification ... #Causes #Workup
Causes of Nephrolithiasis - Differential Diagnosis Algorithm
Radio-opaque - Calcium-containing - 90% of stones
Radiolucent - Non-calcium 10%
Differential Diagnosis Algorithm ... of stones: • Urinary ... overproduction • Low ... solubility: • Low ... Hypocitraturia • RTA Type
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
normal volume-based algorithm ... diuresis can be high ... water intake (Primary ... polydipsia), Low ... differential #diagnosis #table
Polycythemia - Differential Diagnosis Algorithm
Polycythemia itself isn’t a diagnosis. Like many things, it is a condition
Differential Diagnosis Algorithm ... up EPO levels Primary ... levels: realllly low ... levels: normal/high ... #workup #hematology
Preoperative Risk Evaluation

Major Pre-Op Questions:
1. Does the patient have any modifiable risk factors that could be
ASA class If ... high risk > 1% risk ... event, follow ACC algorithm ... Orthopedic • Low ... What is the type
Causes of Hyperkalemia
l. Pseudohyperkalemia
  A Cellular efflux; thrombocytosis, erythrocytosis, leukocytosis, in vitro hemolysis
  B.
Pseudohypoaldosteronism type ... Primary adrenal ... Drug-associated: heparin, low-molecular-weight ... Differential #Diagnosis #High ... #Potassium #Classification